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Fishnder 300C Installation Instructions

Compare the contents of this package with the packing list on the box. If any pieces are missing, contact your Garmin dealer immediately.

Before you begin the installation:

Read and follow the instructions to install the Fishnder 300C.

Gather the appropriate fasteners and tools.

Verify that all cables can reach the Fishnder 300C mounting location and the transducer.

Wear safety goggles and a dust mask when drilling, cutting, or sanding.

If you experience difculty installing the Fishnder 300C, contact Garmin Product Support or contact a professional installer.

WARNING: See the Important Safety and Product Information guide in the product box for product warnings and other important

information.

To install and use your Fishnder 300C:

1. Select a location.

2. MounttheFishnder300C.

3. Installthetransducer.

4. Installthewiringharness.

5. Test the installation.

Step 1: Select a Location for the Fishnder 300C

Consider the following when you select an installation location:

Provide optimal viewing as you operate your vessel.

Allow easy access to the keypad on the Fishnder 300C.

Is strong enough to support the weight of the Fishnder 300C and protect it from excessive vibration or shock.

Allow room for the routing and connection of the cables. There should be at least a 3-inch (8 cm) clearance behind the case.

DO NOT mount the Fishnder 300C in an area that is exposed to extreme temperature conditions.

NOTE: The temperature range for the Fishnder 300C is from 5°F to 131°F (from -15°C to 55°C). Extended exposure to temperatures exceeding this

range (in storage or operating conditions) may cause failure of the LCD screen or other components. This type of failure and related consequences are

not covered by the manufacturer’s limited warranty.

Step 2: Mount the Fishnder 300C

You can mount your Fishnder 300C in one of two ways:

Bail Mount—mount the Fishnder 300C onto the bracket that attaches to the console or overhead.

Flush Mount—use the ush mount kit to mount the Fishnder 300C into a at panel.

Bail Mounting the Fishnder 300C

The Fishnder 300C is suitable for mounting in exposed locations or at the navigation station. The included tilt mounting bracket can be used

for console or overhead mounting. Bail mounting requires the following tools and hardware:

Three of the included number 8 (4.2 × 1.4 DIN7981) ANSI mounting screws

Phillips-head screwdriver (not included)

Drill and drill bit (not included)

Center punch and hammer (not included)

•

December 2007 190-00864-03 Rev. B Printed in Taiwan

Summary of content (8 pages)

PAGE 1
Fishfinder 300C Installation Instructions Compare the contents of this package with the packing list on the box. If any pieces are missing, contact your Garmin dealer immediately. Before you begin the installation: • Read and follow the instructions to install the Fishfinder 300C. • Gather the appropriate fasteners and tools. • Verify that all cables can reach the Fishfinder 300C mounting location and the transducer. • Wear safety goggles and a dust mask when drilling, cutting, or sanding.
PAGE 2
Use the following table to determine the drill bit size: Material Material Thickness (in.) Material Thickness (mm) Hole Size (in.) Hole Size (mm) Hole Size (Drill Number) Aluminum alloy sheet metal from 1/32 to 5/64 from 0.76 to 2.03 .128 3.25 30 from 3/32 to 3/8 from 2.28 to 9.52 .147 3.73 26 Fiberglass - all thicknesses .140 3.56 28 High Density Plastic - all thicknesses .125 3.17 1/8 Plywood (resin impregnated)—Professional installation recommended .144 3.
PAGE 3
8. If the top and bottom mounting covers are attached to the front of the Fishfinder 300C, remove them by unsnapping the covers from the sides. 9. Place the Fishfinder 300C into the cutout. Mounting covers 10.Securely tighten the four mounting screws through the Fishfinder 300C into the drilled mounting holes. Note: Stainless-steel screws may bind when screwed into fiberglass and overtightened. Garmin recommends applying an anti-galling stainless antiseize lubricant to the screw before using. 11.
PAGE 4
Mounting the Transducer on a Trolling Motor To mount the transducer on a trolling motor: 1. Slide the large cable tie through the slot on the transducer mount, with the ridges of the cable tie facing up, until equal lengths of cable tie extend on both sides of the mount. note: For cold water, or heavy timber or debris areas, a metal 4–5" (100–130 mm) worm-gear clamp is recommended. 2. Position the mount gasket on the curved top of the transducer mount. 3.
PAGE 5
Apply marine sealant to all screw threads to prevent water from seeping into the transom. Mount the transducer cable cover well above the waterline. Transducer should extend 1/8" (3.2 mm) below a fiberglass hull or 3/8" (9.5 mm) below an aluminum hull. Ensure that the transducer is below water level when the boat is on plane at high speed. Mount the transducer parallel with the bottom. Do not mount the transducer directly in the path of the propeller.
PAGE 6
Step 4: Install the Wiring Harness The Fishfinder 300C comes with a cable assembly that connects it to power and to the transducer with one connection and provides interface capabilities for connecting external devices. The color code in the diagram on page 7 indicates the appropriate harness connections. The replacement fuse is an AGC/3AG 3A fuse. If it is necessary to extend the power wires, use 22 AWG wire. Do not cut the transducer cable. Cutting the transducer cable voids your warranty.
PAGE 7
To transducer (Red) + Vdc (Black) Ground dc power source (Blue) NMEA 0183 OUT RXD + NMEA device (optional) RXD Alarm relay (optional) 100 ma maximum coil current (Yellow) Alarm Low Fishfinder 300C Wiring Diagram Connecting to a NMEA device You can connect the Fishfinder 300C to additional NMEA 0183-compatible electronic equipment, such as a Garmin GPS (Global Positioning System) device. If equipped with a capable transducer, the Fishfinder 300C can send depth, temperature, and speed information.
PAGE 8
Step 5: Test the Installation Note: Although it is possible to perform some checks with the boat on a trailer, the boat should be in the water to properly test the installation. Press and hold the Fishfinder 300C. POWER key until the Fishfinder 300C beeps. Use ROCKER and SELECT to highlight and select menu items on the The first time you turn your Fishfinder 300C on, you must configure a series of initial settings. To initialize your Fishfinder 300C settings: 1. Language—select the on-screen language. 2.